Means for dispensing liquids under pressure



Feb. 28, 1933. J WERDER ,899,2

MEANS FOR DISPENSING LIQUIDS UNDER PRESSURE Filed March 1, 1929 Patented Feb. 28, 1933 PATENT OFFICE I03! I. wanna. or, 0310 ms roa msrname mourns mm Application fled Inch 1,

' This invention relates to means for dispensin liquids under pressure, and more partic arly to means for raymg from the original package such liquids as lubricating 5 oils, insecticides, etc.

Heretofore, in the spraying of such liquids, it has been customary to employ a spec al spraying device operated by compressed air, such air being supplied either manually by means of a pump, as in the usual hand spray- F ers, or by means of a motor driven compressor such as is commonly employed at garages and automobile service stations.

The general object of the present invention 5 is to obviate the necessity for the use of compressed air, and to provide a self contained package in which the liquid is stored under a pressure sufiicient to forcibly discharge the liquid through a suitable nozzle. To this end, I propose to charge the liquid with a neutral gas such as carbon dioxide and to package the same in sealed receptacles or con tainers. I also propose to provide a spray gun capable of being attached to such a sealed package, and having means for unctur ng the seal as the gun is attached. practice, a user of such liquids will purchase a spray gun as permanent equipment and this gun may then be applied to successive packages of liquid under pressure, as required, each package being used until exhausted, and then d1scarded.

More specifically, one feature of the invention conslsts in providing a spray gun having a handle in the form of a pistol grip and in attaching the packa e or container to the lower end of such han le, whereby the weight is conveniently supported. Another feature consists in the provision of means for forming a liquid tight joint or connection between the gun or container by means of metal parts onl Iii order that the invention may be readily understood, reference is had to the accompanying drawing, forming part of this specification, and in which Figure l is an assembly view partly in side elevation and partly in longitudinal section, showing my complete" n and li uid container, as they appear w en ready or use;

1m. Bertel- Io.

' Figures 2, 3 and 4 are enlarged fra entary detailed vertical sections throng the upper art of the container, showing the socket y which it is connected to the and illustrating the steps offilling, se g and puncturing the container; and

Figure 5 is a perspective view on an enlargifzd scale showing the puncturing device itse I Referring to the drawing in detail, 1 des' nates a suitable receptacle or container whi%1 c preferably consists of a sheet metal can. This as a top 2 permanently secured thereto and preferably dome-shaped, as shown, and to this top is secured, as by brazing or soldering, a socket member 3.

Asiphon tube 4 has its upper end set into the soc et member 3 and extends downwardly into the receptacle to a point near the bottom thereof, as 0 early shown in Figure 1.

Immediatel above the upper end of the tube 4, is a c amber 5, and above this is a larger chamber 6. Resting on the shoulder between these two chambers and permanently secured thereto as by soldering, is a sealing disc 7, preferably formed of thin sheet metal. This constitutes a wall which serves to confine the liquid and which controls communication with the interior of the receptacle.

Above the chamber 6 is a still larger bore 9, the upper portion of which is screw threaded, as s own at 10. Between the bores 6 and 9, is an annular shoulder having a square, sharp edge 8, the walls of which are at right angles to each other. This sharp edge constitutes an important feature of the invention, andis designed to cooperate with an element of the gun in order to form a tight joint, as hereinafter described.

In order to fill the receptacle or container with the liquid under pressure, I provide a by-pass around the seal 7, such by-p'ass being illustrated in the present instance as consisting of a port 11 extending downwardly from the bore 9 and meeting a cross port 12 extend' ing from the side of the socket member 3 into the chamber 5. The inner portion of this port 12 is of reduced diameter and such portion has, at its outer end, a sharp edged shoulder 00 12. The outer portion of the port 12 is somewhat enlar d and internally screw threaded, as indicate at 13, and working in this threaded ortion is a correspondingly threaded plug 14 aving at its inner end a conical surface 14a.

In practice, the receptacle or container is filled with a liquid charged with a neutral {as such ascarbon dioxide, under pressure. he charging and filling may be carried out in the manner described in my prior Patent N o. 1,762,903, dated June 10, 1930, except that, in the resent case, the filling nozzle is applled to tile bore 10 of the socket member 3, and the screw plug 14 bein in the position shown in Figure 2, the liqui enters the receptacle through the ports 11 and 12, as indicated by the arrows. After the receptacle has been filled to the desired extent, the plug 14 is screwed up until the conical end 14 snugly engages the sharp edge 12' of the thus formin a gas and liquid tight seal. The outer end of the plug 14 is then cut off flush with the surface of the socket member 3, as shown in Figure 3, thereby makin it impossible to remove this plug. The fi led and sealed can is then ready for use.

While I have I shown and described one method of filling my improved receptacle, it will be understood that the invention is by no means limited to this method, since other methods will no doubt suggest themselves, and may be employed, if desired.

Arranged to cooperate with the screw threaded socket 10 on the receptacle is a member 15 carried by the n and provided with a correspondingly th eaded lu 16. The lower end of this plug is forme with a tapered or conical sur ace, as best shown at 18 in Figure 4, and this surface, when the plu is screwed down, is forced into contact wit the sharp edge 8 between the bores 6 and 9 of the socket member, thus forming a liquid tight joint these parts being preferably constructed of brass or the like.

' Inside the plug 16 is an axially extending chamber 17 in which is mounted a seal puncturing device 19. As shown in Figure 5, this is referably cylindrical in form and is provi ed at its lower end with a shoulder 20 adapted to seat again the end of the lug 16, and with one or more longitudinal c annels .22. At its extreme lower end, the puncturing device carries a pointed member 21 referably relatively thin, so as to give :1 km effect. It isobvious that when the socket and plu are screwed together, this pointed knife bla e or cutter will be forced against and through the sealing disc 7, thus rupturing the same and permitting the liquid to be forced, under its own pressure, up through the tube 4 and thence through the channels 22 into the chamber 17.

The member 15 is secured to the gun as by means of a screw threaded portion 23 which fits within a similarly threaded socket in the port 12, Th

e blade fi gun handle, and extending through the porv tion 23 is a port or passa with the chamber 17. cross the socket beyond the member 23 is preferably mounted a woven wire strainer 26 to insure against the passage of any foreign matter to the spray nozzle.

The gun itself, as clearly shown in Figure 1, is in the shape of a conventional pistol, having a handle 25 in the form of a pistol grip, and a barrel 27. A tube extends from the barrel 27 down into the handle and communicates with the passage 24, so that liquid may freely flow from the rece tacle up to the barrel 27. At the end of the barrel is a suitable s ray nozzle 30, and passage of the liquid to sue nozzle is controlledby valve mecha nism within the barrel, such valve mechanism ing operated by means of a tri ger 29. is trigger actuates a spring presse plunger 31, the movement of which is regulated by an adjusting crew 32. The details of construction of this gun and its valve mechanism form no art of the present invention.

It will e particularly observed that the attaching member 15 having the screw threaded plug 16 is located at the lower end of the pistol grip handle 25, so that when this handle is grasped by the operator, the weight of the receptacle 1 and its contents will hang directly below the operators hand. This tends to maintain the barrel 27 in a more or less horizontal position and relieves the operator from any strain such as would result from attaching the receptacle to the gun at any other point, as for example, to the barrel itself. In other words, w1th the arrangement shown, the weight of the receptacle exerts no leverage, but the center of gravity thereof is located directly below the point of supl't. It will be further noted that by virtue of my im roved construction, involving the s arp go 8 and the conical surface 18, I am enab ed to roduce a liquid tight joint or connection wit out the use of any soft or fibrous packing or washers whatsoever. This is a distinct advantage, especially where the device is employed for dispensing hydrocarbon oils which, as is well known, have a destructive action on rubber and the like. It will be obvious that when the plug 16 and socket 10 are screwed together, the cutter 21 will rst engage and puncture the seal 7, and then, by a further movement, the parts 8 and 18 will be brought into close contact, thus effecting a liquid tight joint, independent of the screw threads themselves. Thus, while the screw threaded connection prevents any serious escape of liquid at the moment that the seal is punctured, the screw threads are not relied upon to form a permanently tight joint, but such joint is provided by the elements 8 and 18, as described, which thereupon prevent leakage or seepage of the liquid.

0 24, communicating In conclusion, it will be understood that the spray gun itself is, of course, retained by the purchaser as permanent equipment while any number of receptacles containing the desired liquid may be bought and successively attached to the gun as the contents become exhausted. The successive receptacles may of course contain the same or difl'erent liquids, as desired.

What I claim is 1. The combination with a containerin which liquid is held under pressure, sai container having adischarge opening closed by a frangible seal, of a spray gun having means for attaching the same to said container adjacent said opening and means for puncturing said seal, said gun and container having cooperating wholly metallic elements which, when brought into engagement as the gun is attached serve to effect a liquid tight joint between said gun and container.

2. The combination with a container in which liquid is held under pressure, of a dispensing gun adapted to be attached thereto, said container having an internally screw threaded socket within which is an annular seat and at the bottom of which is located a sealing disc serving as a closure for the container, and said gunbeing provided with a correspondingly threaded p ug fitting said socket and having at its end means forpuncturing said sealing disc and admitting liquid to said gun when the parts are screwed together and also having means engaging said seat to form a liquid tight joint.

3. The combination with a container in which liquid is held under pressure, of a dispensing gun adapted to be attached thereto, said container havin a screw threaded socket at the bottom of WhlCh is located a relativel thin wall controlling communication wit the interior of the container, and above said wall an internal annular shoulder, and said gun being provided with a correspondingly threaded p ug having at its end means or puncturing said thin wall, and with a conical portion adapted to engage said shoulder, whereby, when said plug and socket are screwed together, said thin wall is punctured, and said conical portion and shoulder are brought into close contact to form' a liquid tight joint.

4. The combination with a container in which liquid is held under pressure, of a dispensing gun adapted to be attached thereto, said container having an internally screw threaded socket, at the bottom of which is located a thin wall controlling communication with the interior of the container, and said gun being provided with a correspondingly threaded plug fitting said socket, and means whereby, together, the said thin wall is first punctured and then a liquid tight joint, independent 0 said screw threads, established between the gun having as said plug and socket are screwed end surface of said plug and said socket at a point inwardly of the screw threads.

5. As an article of manufacture, a closed receptacle provided with an open, screw threaded socket having therein a puncturable sealing disc permanentl secured thereto, said receptacle having a filling port by-passing said disc, and opening into said socket outside of said disk.

6. The combination with a container in which fluid is held under pressure, of a dispensing gun adapted to be attached thereto,

said container having a screw-threaded socket at the bottom of which is located a sealing disc normally closing thecontainer, and said at one end a plug adapted to be screwed into said socket, and at the other end a discharge nozzle, a manually operated valve carried by said gun for governing the discharge of fluid from said nozzle, and means at the end of said plug serving, when the same is screwed into said socket, both to puncture said sealing disc and to form. with the interior of said socket a fluid tight joint, whereby the flow of fluid from said container is thereafter controlled by said valve.

In testimony whereof I aflix my signature. 

